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焊接热循环对SA508-3钢临界粗晶区组织和性能的影响

吕晓春, 何鹏, 秦建, 杜兵, 胡忠全

吕晓春, 何鹏, 秦建, 杜兵, 胡忠全. 焊接热循环对SA508-3钢临界粗晶区组织和性能的影响[J]. 焊接学报, 2014, 35(12): 47-49.
引用本文: 吕晓春, 何鹏, 秦建, 杜兵, 胡忠全. 焊接热循环对SA508-3钢临界粗晶区组织和性能的影响[J]. 焊接学报, 2014, 35(12): 47-49.
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LÜ Xiaochun, HE Peng, QIN Jian, DU Bing, HU Zhongquan. Effect of welding thermal cycle on microstructure and properties of intercritically reheated coarse grained heat affected zone in SA508-3 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(12): 47-49.
Citation: LÜ Xiaochun, HE Peng, QIN Jian, DU Bing, HU Zhongquan. Effect of welding thermal cycle on microstructure and properties of intercritically reheated coarse grained heat affected zone in SA508-3 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(12): 47-49.
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焊接热循环对SA508-3钢临界粗晶区组织和性能的影响

  • 1.

    哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001;哈尔滨焊接研究所, 哈尔滨 150028

  • 2.

    哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001

  • 3.

    哈尔滨焊接研究所, 哈尔滨 150028

  • 4.

    清华大学机械工程系, 北京 100084

基金项目: 国家科技重大专项(2011ZX04016-061,2012ZX06004-001-001-005)

Effect of welding thermal cycle on microstructure and properties of intercritically reheated coarse grained heat affected zone in SA508-3 steel

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;Harbin Welding Institute, Harbin 150028, China

  • 2.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

  • 3.

    Harbin Welding Institute, Harbin 150028, China

  • 4.

    Mechanical Engineering Department of Tsinghua University, Beijing 100084, China

摘要

    摘要
  • 摘要: 针对核电设备用SA508-3钢临界粗晶区,采用热模拟技术研究了不预热下焊接热循环对临界粗晶区组织和性能的影响.结果表明,临界粗晶区在原奥氏体晶界上析出了项链状的隐晶马氏体组织,使其性能恶化,是焊接接头中最为薄弱的区域.临界粗晶区在经历峰值温度400~650℃的焊接热循环后,冲击韧性得到明显的改善,此时可以获得良好的强韧性匹配.在SA508-3钢多层多道焊接过程中,通过合理控制层道间焊接热循环条件,可有效改善临界粗晶区组织和性能.
    Abstract: The effect of welding thermal cycle on the microstructure and properties of the intercritically reheated coarse grained heat affected zone(IC-CGHAZ) was studied using thermal simulation technology. The results showed that the formation of fine martensite along the prior austenite grain boundaries deteriorating the performance of IC-CGHAZ. The IC-CGHAZ is the weakest area in the welded joint. The impact toughness of the joint was improved significantly allowing the joint have a good match in hardness and toughness when the IC-CGHAZ experienced a thermal cycle with peak temperature of 400- 650℃.The microstructure and properties of IC-CGHAZ can be improved effectively by precisly controlling the layer thickness and the welding thermal cycle conditions in SA508-3 steel multi-pass welding processing.
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  • 收稿日期:  2014-03-30

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